DolphinWX: Allow cancelling gcz compression.

Source/Core/DiscIO/Blob.h

@@ -66,7 +66,7 @@ private:
 // Factory function - examines the path to choose the right type of IBlobReader, and returns one.
 IBlobReader* CreateBlobReader(const std::string& filename);
 
-typedef void (*CompressCB)(const std::string& text, float percent, void* arg);
+typedef bool (*CompressCB)(const std::string& text, float percent, void* arg);
 
 bool CompressFileToBlob(const std::string& infile, const std::string& outfile, u32 sub_type = 0, int sector_size = 16384,
 		CompressCB callback = nullptr, void *arg = nullptr);

Source/Core/DiscIO/CompressedBlob.cpp

@@ -195,6 +195,7 @@ bool CompressFileToBlob(const std::string& infile, const std::string& outfile, u
 	int num_compressed = 0;
 	int num_stored = 0;
 	int progress_monitor = std::max<int>(1, header.num_blocks / 1000);
+	bool was_cancelled = false;
 
 	for (u32 i = 0; i < header.num_blocks; i++)
 	{
@@ -206,7 +207,9 @@ bool CompressFileToBlob(const std::string& infile, const std::string& outfile, u
 				ratio = (int)(100 * position / inpos);
 
 			std::string temp = StringFromFormat("%i of %i blocks. Compression ratio %i%%", i, header.num_blocks, ratio);
-			callback(temp, (float)i / (float)header.num_blocks, arg);
+			was_cancelled = !callback(temp, (float)i / (float)header.num_blocks, arg);
+			if (was_cancelled)
+				break;
 		}
 
 		offsets[i] = position;
@@ -261,11 +264,20 @@ bool CompressFileToBlob(const std::string& infile, const std::string& outfile, u
 
 	header.compressed_data_size = position;
 
+	if (was_cancelled)
+	{
+		// Remove the incomplete output file.
+		f.Close();
+		File::Delete(outfile);
+	}
+	else
+	{
 		// Okay, go back and fill in headers
 		f.Seek(0, SEEK_SET);
 		f.WriteArray(&header, 1);
 		f.WriteArray(offsets, header.num_blocks);
 		f.WriteArray(hashes, header.num_blocks);
+	}
 
 cleanup:
 	// Cleanup
@@ -301,12 +313,15 @@ bool DecompressBlobToFile(const std::string& infile, const std::string& outfile,
 	const CompressedBlobHeader &header = reader->GetHeader();
 	u8* buffer = new u8[header.block_size];
 	int progress_monitor = std::max<int>(1, header.num_blocks / 100);
+	bool was_cancelled = false;
 
 	for (u64 i = 0; i < header.num_blocks; i++)
 	{
 		if (i % progress_monitor == 0)
 		{
-			callback("Unpacking", (float)i / (float)header.num_blocks, arg);
+			was_cancelled = !callback("Unpacking", (float)i / (float)header.num_blocks, arg);
+			if (was_cancelled)
+				break;
 		}
 		reader->Read(i * header.block_size, header.block_size, buffer);
 		f.WriteBytes(buffer, header.block_size);
@@ -314,7 +329,16 @@ bool DecompressBlobToFile(const std::string& infile, const std::string& outfile,
 
 	delete[] buffer;
 
+	if (was_cancelled)
+	{
+		// Remove the incomplete output file.
+		f.Close();
+		File::Delete(outfile);
+	}
+	else
+	{
 		f.Resize(header.data_size);
+	}
 
 	delete reader;
 

Source/Core/DolphinWX/GameListCtrl.cpp

@@ -1123,14 +1123,14 @@ void CGameListCtrl::OnWiki(wxCommandEvent& WXUNUSED (event))
 	WxUtils::Launch(wikiUrl);
 }
 
-void CGameListCtrl::MultiCompressCB(const std::string& text, float percent, void* arg)
+bool CGameListCtrl::MultiCompressCB(const std::string& text, float percent, void* arg)
 {
 	percent = (((float)m_currentItem) + percent) / (float)m_numberItem;
 	wxString textString(StrToWxStr(StringFromFormat("%s (%i/%i) - %s",
 				m_currentFilename.c_str(), (int)m_currentItem+1,
 				(int)m_numberItem, text.c_str())));
 
-	((wxProgressDialog*)arg)->Update((int)(percent*1000), textString);
+	return ((wxProgressDialog*)arg)->Update((int)(percent*1000), textString);
 }
 
 void CGameListCtrl::OnMultiCompressISO(wxCommandEvent& /*event*/)
@@ -1162,6 +1162,7 @@ void CGameListCtrl::CompressSelection(bool _compress)
 			1000,
 			this,
 			wxPD_APP_MODAL |
+			wxPD_CAN_ABORT |
 			wxPD_ELAPSED_TIME | wxPD_ESTIMATED_TIME | wxPD_REMAINING_TIME |
 			wxPD_SMOOTH
 			);
@@ -1235,9 +1236,9 @@ void CGameListCtrl::CompressSelection(bool _compress)
 	Update();
 }
 
-void CGameListCtrl::CompressCB(const std::string& text, float percent, void* arg)
+bool CGameListCtrl::CompressCB(const std::string& text, float percent, void* arg)
 {
-	((wxProgressDialog*)arg)->
+	return ((wxProgressDialog*)arg)->
 		Update((int)(percent*1000), StrToWxStr(text));
 }
 
@@ -1300,6 +1301,7 @@ void CGameListCtrl::OnCompressISO(wxCommandEvent& WXUNUSED (event))
 		1000,
 		this,
 		wxPD_APP_MODAL |
+		wxPD_CAN_ABORT |
 		wxPD_ELAPSED_TIME | wxPD_ESTIMATED_TIME | wxPD_REMAINING_TIME |
 		wxPD_SMOOTH
 		);

Source/Core/DolphinWX/GameListCtrl.h

@@ -113,6 +113,6 @@ private:
 	static size_t m_currentItem;
 	static std::string m_currentFilename;
 	static size_t m_numberItem;
-	static void CompressCB(const std::string& text, float percent, void* arg);
+	static bool CompressCB(const std::string& text, float percent, void* arg);
-	static void MultiCompressCB(const std::string& text, float percent, void* arg);
+	static bool MultiCompressCB(const std::string& text, float percent, void* arg);
 };